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Part: 828BRSeries
Category:
Analog & Mixed-Signal Processing
-> Filters
-> Audio Specific
Description: 8-bit Programmable 4-pole PaIR Filters
Company: Frequency Devices, Inc.
Datasheet: Download 828BRSeries datasheet File size : 1002 kB
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Datasheet text preview:
828BP & 828BR Series
Band Pass and Band Reject
Description: The 828BP and 828BR Series are 4-pole-pair digitally programmable band-pass and band-reject (notch) active filters. These new filters take advantage of the company's proprietary designs using surface-mount technology to provide a low profile, compact package in minimal board space. 828BP and 828BR filters are factory tuned to one of three factory set tuning ranges or 8-bit custom ranges from 1 Hz to 25.6 kHz. Each filter type features a near theoretical amplitude/phase response along with low output voltage noise enabling these filters to achieve a 10,000:1 or better dynamic signal range Pretuned to within ±2% of the center frequency, band-pass 828BP filters pass all frequencies lying between the upper and lower -3 dB points of the amplitude response curve, while 828BR band-reject (notch) filters sharply attenuate those frequencies that are bound and defined by the bottom of the notch. Available Q's for 828BP models are 1, 2, 5, or 10 and 828BR filters are 3 or 10. Features/Benefits: · Compact 2.0"L x 2.0"W footprint minimizes board space requirements. · Plug-in ready-to-use, reducing engineering design and manufacturing cycle time. · Factory tuned, no external clocks or adjustments needed. · Broad range of center frequencies to meet a wide range of applications. Applications · Power line interference rejection · Transducer output filtering · Production test instrumentation · Medical electronics equipment and research · Comb filtering and equalization · Noise and harmonic analysis · RMS measurements · Frequency spectrum analysis
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8 Bit Programmable 4-Pole Pair Filters
Programmable Specifications: . . . . . . . . . . . .Page Digital Tuning & Control . . . . . . . . . . . . . . . . . . . . .2 Available Band-Pass Models: 828BP4 4 pole pair . . . . . . . . . . . . . . . . . . .3 Available Band-Reject Models: 828BR4 4-pole pair . . . . . . . . . . . . . . . . . . .3 General Specifications: Ordering Information . . . . . . . . . . . . . . . . . . . . . . .4 Pin-Out/package data . . . . . . . . . . . . . . . . . . . . . .4
25 Locust St, Haverhill, Massachusetts 01830 · Tel: 800/252-7074, 978/374-0761 · FAX: 978/521-1839 e-mail: sales@freqdev.com · Web Address: http://www.freqdev.com
828BP & 828BR Series
8-Bit Programmable Filters
Digital Tuning Characteristics
The digital tuning interface circuits are a parallel set of eight (8) 4053 CMOS switches which accept CMOS compatible inputs for the eight tuning bits (D0 - D7). Filter tuning follows the tuning equation given below: fc = ( fmax/256 ) [ 1 + D7 x 2 + D6 x 2 + D5 x 2 + D4 x 2 + D3 x 2 + D2 x 2 + D1 x 2 + D0 x 2 ] where D1 - D7 = "0" or "1", and fmax = Maximum tuning frequency; fc = corner frequency; Minimum tunable frequency = fmax/256 (D0 thru D7 = 0); Minimum frequency step (Resolution) = fmax/256
2.00 OUT +Vs -Vs D7 D6 D5 D4 GND D3 D2 D1
3 2 1 0 7 6 5 4
Digital Tuning & Control Characteristics
Pin-Out Key
IN OUT GND +Vs -Vs Os Analog Input Signal Analog Output Signal Power and Signal Return Supply Voltage, Positive Supply Voltage, Negative Offset Adjustment D7 Tuning D6 Tuning D5 Tuning D4 Tuning D3 Tuning D2 Tuning D1 Tuning D0 Tuning Bit Bit Bit Bit Bit Bit Bit Bit 7 (MSB) 6 5 4 3 2 1 0 (LSB)
Data Input Specifications
Input Data Levels (CMOS Logic) 4 Vdc max. 15 Vdc max.
Input Voltage (Vs = 15 Vdc) Low Level In 0 Vdc min. High Level In 11 Vdc min. Input Current High Level In Low Level In Input Capacitance Input Data Format Positive Logic Bit Weighting D0 D7 Frequency Range - 10 µA typ. -5 +10 µA typ. 5 pF typ
-5
D0 IN Os
4
-1 µA max.. +1 µA max. 7.5 pF max. MSB 2
7
Bottom View
Frequency Select Bits Logic "1" = +Vs Logic "0" = Gnd (Binary-Coded) LSB (least significant bit) MSB (most significant bit) 256 : 1, Binary Weighted
--2
6
--2
5
--2
4
--2
3
--2
2
--2
1
LSB 2
0
Bit Weight
Corner Frequency
fc
D7 0 0 0 0 0 0 0 0 1
D6 0 0 0 0 0 0 0 1 1
D5 0 0 0 0 0 0 1 1 1
D4 0 0 0 0 0 1 1 1 1
D3 0 0 0 0 1 1 1 1 1
D2 0 0 0 1 1 1 1 1 1
D1 0 0 1 1 1 1 1 1 1
D0 0 1 1 1 1 1 1 1 1
fmax/256 fmax/128 fmax/64 fmax/32 fmax/16 fmax/8 fmax/4 fmax/2 fmax
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25 Locust St, Haverhill, Massachusetts 01830 · Tel: 800/252-7074, 978/374-0761 · FAX: 978/521-1839 e-mail: sales@freqdev.com · Web Address: http://www.freqdev.com
828BP & 828BR Series
Band-Pass & Band-Reject
Model Product Specifications Size Range fo Available "Q's"1 Q Accuracy Theoretical Transfer Characteristics 828BP4 Band-Pass 2.0" x 2.0" x 0.5" 1 Hz to 25.6 kHz 1, 2, 5, 10 ±10% Appendix A Pages 41 & 42
8-Bit Programmable 4-Pole Pair Filters
Model Product Specifications Size Range fo Available "Q's"1 Q Accuracy Theoretical Transfer Characteristics Notch Attenuation 828BR4 Band-Reject 2.0" x 2.0" x 0.5" 1 Hz to 25.6 kHz 3, 10 ±10% Appendix A Pages 43 45 db typ. 0± 0.25 dB typ. 0± 0.50 dB max. 24 dB/octave fo ±0.01%/°C FMA-02A ±2% max.
Pass-Band Gain
(non-inverting)
0± 0.25 dB typ. 0± 0.50 dB max. 24 dB/octave fo ±0.01%/°C FMA-02A ±2% max.
Pass-Band Gain
(non-inverting)
Attenuation Rate Center Frequency Stability Filter Mounting Assembly
Attenuation Rate Center Frequency Stability Filter Mounting Assembly
fO =
1. Q Quality Factor for band-pass and band-reject filters. Q = fO/(fH-fL)
fHfL
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25 Locust St, Haverhill, Massachusetts 01830 · Tel: 800/252-7074, 978/374-0761 · FAX: 978/521-1839 e-mail: sales@freqdev.com · Web Address: http://www.freqdev.com
828BP & 828BR Series
Specification
(25°C and Vs ±15Vdc)
Analog Input Characteristics1 Impedance Voltage Range Max. Safe Voltage Analog Output Characteristics Impedance (Closed Loop) Linear Operating Range 2 Maximum Current 3 Offset Voltage Offset Temp. Coeff. Power Supply (±V) Rated Voltage Operating Range Maximum Safe Voltage Quiescent Current Temperature Operating Storage
Notes: 1. Input and output signal voltage referenced to supply common. 2. Output is short circuit protected to common. DO NOT CONNECT TO ±Vs. 3. Adjustable to zero. 4. Units operate with or without offset pin connected.
Pin-Out and Package Data Ordering Information
Pin-Out & Package Data
2.00
10 k min. ± 10 Vpeak ±Vs
0.5
G-3
0.15 min. 0.025 Dia.
11 typ. 10 max. ±10V ±2 mA 22 mV typ. 20 mV max. 50 µV/°C
Side View
All dimensions are in inches All Case Dimensions ± 0.02"
OUT +Vs -Vs
Grid Dimensions 0.1" x 0.1"
±15 Vdc ±12 to ±18 Vdc ±18 Vdc
2.00
D7 D6 D5 D4 GND D3 D2 D1 D0 IN Os
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±25 mA typ. ±40 mA max.
-20 to +70°C -25 to +85°C
Bottom View
Filter Mounting Assembly-See FMA-02A
Ordering Information
Filter Type BP - Band Pass BR - Band Reject
DC Offset Adjustment
± Vs Do not connect if trim is not required. 20 k (Cermet) OS
828BP4/10-4
"Q" BP - 1, 2, 5, 10 BR - 3, 10 Model Model Number 2 3 4
- Vs
Tuning Range (Hz) 1.0 to 256 10 to 2560 100 to 25.6k
Minimum Step(Hz) 1.0 10 100
Case G-3 G-3 G-3
We hope the information given here will be helpful. The information is based on data and our best knowledge, and we consider the information to be true and accurate. Please read all statements, recommendations or suggestions herein in conjunction with our conditions of sale which apply to all goods supplied by us. We assume no responsibility for the use of these statements, recommendations or suggestions, nor do we intend them as a recommendation for any use which would infringe any patent or copyright. PR-828BP/BR-03
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25 Locust St, Haverhill, Massachusetts 01830 · Tel: 800/252-7074, 978/374-0761 · FAX: 978/521-1839 e-mail: sales@freqdev.com · Web Address: http://www.freqdev.com
Product Handling Procedure
Programmable Filter Modules Power Sequence & ESD
November 2000 Programmable Filters Modules 818, 824, 828, 828BP, 828BR, 854, 858, R854, R858 I. Scope
The following precautions are necessary when handling and installing Frequency Devices programmable filter modules.
II. Digital Circuit Description
The digital input pins connect directly to 4000 series CMOS logic, such as the 4053 analog switch. The power supply (Vss) for the digital logic on the module comes directly from the +15 Volt pin on the module. This sets the threshold voltage at 11.0 V minimum to 15.0 V maximum for a "1" (High) level and 0.0 V minimum to 4.0 V maximum for a "0" (Low) level. Applying a voltage between 4.0 and 11.0 V will produce unpredictable operation. Connecting 5 Volt or 3.3 V logic devices directly to the filter module without using a voltage translator will result in erratic operation of the filter.
III. (VERY IMPORTANT) Power-Up and Power-Down Sequence Do not plug-in or un-plug module while power is applied. It is imperative that power is
supplied to the + 15 V pin on the filter module before or at the same instance that any digital pin is pulled High (> 0.0 V). Failure to do this will result in excessive current flowing through the digital input pin and through a protection diode internal to the 4000 logic, which will result in damage to the module. The proper power-up and power-down sequence is: 1. Connect filter module ground. 2. Connect filter module +15 V. 3. Connect filter module -15 V. 4. Connect the input signal. All four of the above steps can also occur simultaneously. Power-down should occur in the reverse order.
IV. ESD Issues
Like most modern electronic equipment, the modules can be damaged by electrostatic discharge (ESD). The modules are shipped from the factory in sealed, anti-static packaging and should be kept in the sealed package prior to mounting on a circuit board. The following additional rules should also be observed when handling the modules after they are removed from the factory packaging: 1. Only a person wearing a properly grounded wrist strap should handle the modules. 2. Any work surface that the modules are placed on must be properly ESD grounded. 3. Any insulating materials capable of generating static charge (such as paper) should be kept away from the modules. Static generating clothing should be covered with an ESD-protective smock.
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25 Locust St, Haverhill, Massachusetts 01830 · Tel: 800/252-7074, 978/374-0761 · FAX: 978/521-1839 e-mail: sales@freqdev.com · Web Address: http://www.freqdev.com
Others parts begin by 82
82-1 82-2
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